CN101724722B - Blast-furnace pressure-discharging gas recovering device and method - Google Patents
Blast-furnace pressure-discharging gas recovering device and method Download PDFInfo
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- CN101724722B CN101724722B CN2009102508544A CN200910250854A CN101724722B CN 101724722 B CN101724722 B CN 101724722B CN 2009102508544 A CN2009102508544 A CN 2009102508544A CN 200910250854 A CN200910250854 A CN 200910250854A CN 101724722 B CN101724722 B CN 101724722B
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Abstract
The invention discloses blast-furnace pressure-discharging gas recovering device and method of a blast-furnace top pressure equalizing-discharging system, belonging to the technical field of metallurgical industry. The device is suitable for the blast-furnace top pressure equalizing-discharging system which adopts a parallel-tank or three-tank bell-less top charging device and comprises a material tank, a pressure equalizing-discharging system and a secondary pressure-equalizing system, wherein the material tank is connected with a blast furnace through a seal valve, and meanwhile, the material tank is connected with the pressure equalizing-charging system; and the secondary pressure-equalizing system is connected with a pipeline of the pressure equalizing-discharging system. The device is characterized in that: on the pressure equalizing-discharging system of the parallel-tank or three-tank bell-less top charging device, a pressure equalizing-discharging subsystem of each material tank is connected with a pressure-discharging gas recovering system. The invention has simple process, reliable operation and convenient field construction, can reduce the blast-furnace gas consumption and the dust-containing gas emission, and is practical technology with energy saving and environmental protection.
Description
Technical field
The present invention's (or invention) belongs to technical field of metallurgy industry, discloses a kind of blast-furnace pressure-discharging gas recovering device of the equal row pressure of blast furnace furnace roof system and method.This device and method is applicable to the equal row pressure of the blast furnace furnace roof system of employing and jar or three jars of non-bell furnace top charging equipments.
Background technology
In order to improve smelting strength of blast furnace and to reduce coke ratio and guarantee smooth operation of furnace, blast-furnace smelting must adopt high top pressure operation.Therefore for pack into smoothly batch can or from batch can, discharge of crude fuel, batch can must adopt equal row pressure system.All the main purpose of row pressure system is: the upper and lower seal valve smooth opening of control batch can, guarantee pack into smoothly batch can or from batch can, discharge of stove crude fuel, and be the subsystem of blast furnace high top pressure operation system.
As shown in Figure 1: blast furnace adopts the also non-bell furnace top charging equipment of jar, and batch can 1 is made up of batch can 1-1 and batch can 1-2.In the time need packing the crude fuel of batch can 1-1 into blast furnace 3; All the 4-1 of row pressure system need open pressure-balance valve 5-1 and 8-1, all presses coal gas 13-1 through pressure-balance valve 8-1, tornado dust collector 6-1, pressure-balance valve 5-1 batch can 1-1 all to be pressed and is deposited on dust among the tornado dust collector 6-1 during with the last time row pressure and blow and get back in the batch can 1-1; When reaching required pressure, open the seal valve 2-1 between batch can 1-1 and the blast furnace 3, the crude fuel among the batch can 1-1 is packed in the blast furnace 3.When all pressures gas pressure among the batch can 1-1 is not enough, need the equal pressing system 15-1 of secondary is opened, with the nitrogen in the nitrogen pot 14 batch can 1-1 is carried out pressurising.After the crude fuel among the batch can 1-1 is discharged; Need to go into the stove crude fuel when packing batch can 1-1 into; After at first closing the equal pressing system 15-1 of seal valve 2-1, pressure-balance valve 5-1 and 8-1, secondary between batch can 1-1 and the blast furnace 3; Open purge valve 9-1; High pressure gas in the batch can 1-1 carries out roughing out after purge valve 9-1, sound damper 12-1 high altitude discharge through pressure-discharging gas pipeline 7-1 at tornado dust collector 6-1, and when purge valve 9-1 or sound damper 12-1 were out of order, the high pressure gas among the batch can 1-1 was discharged through pressure-discharging gas pipeline 7-1, tornado dust collector 6-1 and purge valve 10-1.If during the high pressure gas hypertonia in the batch can, high pressure gas can carry out release through SV 11-1, the direct high altitude discharge of the high pressure gas that draws off.
Discharge or charging to batch can 1-2 are moved with batch can 1-1.
When blast furnace adopted three jars non-bell furnace top charging equipment, batch can 1 was made up of batch can 1-1, batch can 1-2 and batch can 1-3.Discharge or charging to batch can 1-3 are moved with batch can 1-1.
Each subsystem of the equal row pressure system of batch can 1 is independent of the high pressure gas row pressure in each batch can, has not only wasted a large amount of high pressure gass, and has polluted environment.
Summary of the invention
The objective of the invention is to overcome the deficiency of prior art; A kind of blast-furnace pressure-discharging gas recovering device and method are provided, satisfy the requirement of energy-saving and emission-reduction, simultaneously simple and reliable; Can reduce blast furnace and all press gas using quantity and reduce dust-laden coal gas quantity discharged, be a kind of practical technique of energy-conserving and environment-protective.
The object of the invention is realized through following mode: a kind of blast-furnace pressure-discharging gas recovering device, comprise batch can, equal row pressure system and the equal pressing system of secondary, and wherein batch can is connected with blast furnace through seal valve, and batch can is connected with equal row pressure system simultaneously; The equal pressing system of secondary is through the pipe connection of valving with equal row pressure system; It is characterized in that: and jar or the three jars of equal row pressure of no bell furnace roof systems on, the equal row pressure system of each batch can is connected with the pressure-discharging gas recovery system.
Use the method for blast-furnace pressure-discharging gas recovering device; Be to reclaim trip valve through the control pressure-discharging gas to open and close the time; Certain pressure and volumetrical pressure-discharging gas are partly arranged when coming the row pressure of reclaimed materials jar; And another batch can all pressed in advance, can realize two jars all press in advance each other reaching the purpose of energy-saving and emission-reduction.
Its technology of the present invention is simple, reliable, field conduct convenient, can reduce the equal pressure-discharging gas consumption of blast furnace and reduce dust-laden coal gas quantity discharged, is a kind of practical technique of energy-conserving and environment-protective.
Description of drawings
Fig. 1 is the row pressure system schematic of prior art.
Fig. 2 is a row pressure system schematic of the present invention.
Among the figure, part 1 is a batch can, and part 2 is seal valves, and part 3 is blast furnaces, and part 4 is equal row pressure systems; Part 5 is pressure-balance valves, and part 6 is tornado dust collector, and part 7 is pressure-discharging gas pipelines, and part 8 is pressure-balance valves, and part 9 is purge valves; Part 10 is purge valve (using during accident), and part 11 is SV, and part 12 is sound dampers, and part 13 is all to press coal gas, and part 14 is nitrogen pots; Part 15 is secondary pressure-balance valve group and pipeline, and part 16 is pressure-discharging gas recovery channels, and part 17 is that pressure-discharging gas reclaims trip valve, and part 18 is manually-operated gates.
Embodiment
2 couples of the present invention are described further below in conjunction with accompanying drawing:
The batch can 1 of three tank arrangements is batch can 1-1, batch can 1-2 and batch can 1-3, with accompanying drawing 2 in like manner.
With batch can 1-1 wherein is the example explanation:
Batch can 1-1 is connected with blast furnace 3 through seal valve 2-1, and batch can 1-1 is connected with the equal 4-1 of row pressure system, the tornado dust collector 6-1 top pipe connection of the equal pressing system pipeline of secondary 15-1 and the equal 4-1 of row pressure system; The pressure-discharging gas recovery channel 16-1 of pressure-discharging gas recovery system also is connected on the pipeline of tornado dust collector 6-1 top.
All the 4-1 of row pressure system comprises pressure-balance valve 5-1, tornado dust collector 6-1, pressure-discharging gas pipeline 7-1, pressure-balance valve 8-1, purge valve 9-1, purge valve 10-1 (using during accident), SV 11-1, sound damper 12-1 and all presses gas line 13-1; All press coal gas 13-1 to be connected on the pipeline of tornado dust collector 6-1 top through equal purge valve 8-1.
The equal pressing system of secondary comprises nitrogen pot 14 (shared), secondary pressure-balance valve group and pipeline 15-1, secondary equal pressing system pipeline 15-1 and tornado dust collector 6-1 top pipe connection.
The pressure-discharging gas recovery system comprises that pressure-discharging gas recovery channel 16-1, pressure-discharging gas reclaim two manually-operated gates 18 of trip valve 17 and maintenance usefulness.Pressure-discharging gas reclaims trip valve 17 and is fixed on the pressure-discharging gas recovery channel 16, pressure-discharging gas recovery channel 16-1 and tornado dust collector 6-1 top pipe connection.
In the time need packing the crude fuel of batch can 1-1 into blast furnace 3; All the 4-1 of row pressure system need open pressure-balance valve 5-1 and 8-1, all presses coal gas 13-1 through pressure-balance valve 8-1, tornado dust collector 6-1, pressure-balance valve 5-1 batch can 1-1 all to be pressed and is deposited on dust among the tornado dust collector 6-1 during with the last time row pressure and blow and get back in the batch can 1-1; When reaching required pressure, open the seal valve 2-1 between batch can 1-1 and the blast furnace 3, the crude fuel among the batch can 1-1 is packed in the blast furnace 3.When all pressures gas pressure among the batch can 1-1 is not enough, need the equal pressing system 15-1 of secondary is opened, with the nitrogen in the nitrogen pot 14 batch can 1-1 is carried out pressurising.
Use the method for blast-furnace pressure-discharging gas recovering device: after the crude fuel among the batch can 1-1 is discharged; Need to go into the stove crude fuel when packing batch can 1-1 into; After at first closing the equal pressing system 15-1 of seal valve 2-1, pressure-balance valve 5-1 and 8-1, secondary between batch can 1-1 and the blast furnace 3; Open pressure-discharging gas and reclaim trip valve 17, the control pressure-discharging gas reclaims the 17 switching times of trip valve, and the high pressure gas in the batch can 1-1 enters in the batch can 1-2 through pressure-discharging gas recovery channel 16-1; 1-2 all presses in advance to batch can, closes pressure-discharging gas then and reclaims trip valve 17.Remaining high pressure gas carries out roughing out after purge valve 9-1, sound damper 12-1 high altitude discharge through pressure-discharging gas pipeline 7-1 at tornado dust collector 6-1 among the batch can 1-1; When purge valve 9-1 or sound damper 12-1 were out of order, the high pressure gas among the batch can 1-1 was discharged through pressure-discharging gas pipeline 7-1, tornado dust collector 6-1 and purge valve 10-1.If during the high pressure gas hypertonia in the batch can, high pressure gas can carry out release through SV 11-1, the direct high altitude discharge of the high pressure gas that draws off.
In the time of need packing the crude fuel of batch can 1-2 into blast furnace 3; The batch can 1-2 that all presses in advance opens pressure-balance valve 5-2 and 8-2 again, all presses coal gas 13-2 through pressure-balance valve 8-2, tornado dust collector 6-2, pressure-balance valve 5-2 batch can 1-2 all to be pressed and is deposited on dust among the tornado dust collector 6-2 during with the last time row pressure and blow and get back in the batch can 1-2; When reaching required pressure, open the seal valve 2-2 between batch can 1-2 and the blast furnace 3, the crude fuel among the batch can 1-2 is packed in the blast furnace 3.When all pressures gas pressure among the batch can 1-2 is not enough, need the equal pressing system 15-2 of secondary is opened, with the nitrogen in the nitrogen pot 14 batch can 1-2 is carried out pressurising.
After the crude fuel among the batch can 1-2 is discharged, need to go into the stove crude fuel when packing batch can 1-2 into, action is with batch can 1-1.
During three tank arrangements, the pressure-discharging gas recovery channel of pressure-discharging gas recovery system is communicated with the subsystem of the equal row pressure of the furnace roof of each batch can system.
The present invention utilize the pressure-discharging gas recovery system to adopt and jar or the equal row pressure of the blast furnace furnace roof system of three jars of non-bell furnace top charging equipments in each sub-UNICOM; Through the switching time of control pressure-discharging gas recovery trip valve; Come the reclaimed materials jar that certain pressure and volumetrical part pressure-discharging gas are arranged when row pressure; And another material batch can all pressed in advance, can realize two jars all press in advance each other reaching the purpose of energy-saving and emission-reduction.
Characteristics of the present invention are that technology is simple, reliable, field conduct convenient, can reduce the equal pressure-discharging gas consumption of blast furnace and reduce dust-laden coal gas quantity discharged, are a kind of utility units of energy-conserving and environment-protective.
Claims (2)
1. the method for use of a blast-furnace pressure-discharging gas recovering device, said retrieving arrangement comprise batch can, all row pressure system and the equal pressing system of secondary, and wherein batch can is connected with blast furnace through seal valve, and the while batch can is connected with equal row pressure system; The pipe connection of equal pressing system of secondary and equal row pressure system; It is characterized in that: and jar or the equal row pressure system of three jars of no bell furnace roofs on; The equal row pressure subsystem of each batch can is connected with the pressure-discharging gas recovery system; Described pressure-discharging gas recovery system reclaims trip valve by pressure-discharging gas recovery channel and pressure-discharging gas to be formed, and described pressure-discharging gas recovery channel is connected above the tornado dust collector of equal row pressure system on the pipeline; Described device reclaims trip valve through the control pressure-discharging gas and opens and closes the time, and the pressure-discharging gas of certain pressure and volume is partly arranged when coming the row pressure of reclaimed materials jar, and another batch can is all pressed in advance, realizes equal pressure in advance each other of two jars, reaches the purpose of energy-saving and emission-reduction.
2. the method for use of blast-furnace pressure-discharging gas recovering device according to claim 1 is characterized in that: described pressure-discharging gas reclaims 2 manually-operated gates that trip valve also is provided with maintenance usefulness.
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| CN2009102508544A CN101724722B (en) | 2009-12-30 | 2009-12-30 | Blast-furnace pressure-discharging gas recovering device and method |
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| CN101724722B true CN101724722B (en) | 2012-06-20 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101914646B (en) * | 2010-09-15 | 2012-08-08 | 中冶赛迪工程技术股份有限公司 | Novel device for mounting and overhauling bell-less top charging equipment with parallel hoppers |
| CN102002544B (en) * | 2010-12-22 | 2012-05-23 | 中冶赛迪工程技术股份有限公司 | Switching method for blast-furnace gas dry-wet dust removing systems |
| CN102031321B (en) * | 2010-12-23 | 2012-09-05 | 中冶京诚工程技术有限公司 | Method and device for recovering pressure-equalized coal gas at top of blast furnace |
| CN103255251A (en) * | 2013-06-03 | 2013-08-21 | 中冶赛迪工程技术股份有限公司 | Blast furnace top gas supply system |
| CN107326134A (en) * | 2017-06-17 | 2017-11-07 | 北京首钢国际工程技术有限公司 | The coal gas pressure-equalizing bleeding device and its application method of pressure vessel multistage dedusting |
| CN113549719A (en) * | 2021-06-24 | 2021-10-26 | 北京中冶设备研究设计总院有限公司 | Uniform-pressure-discharge diffusing device and uniform-pressure-discharge diffusing method for blast furnace top |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201362723Y (en) * | 2009-02-09 | 2009-12-16 | 江苏沙钢集团有限公司 | Blast furnace charging bucket full clean gas pressure equalizing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN201362723Y (en) * | 2009-02-09 | 2009-12-16 | 江苏沙钢集团有限公司 | Blast furnace charging bucket full clean gas pressure equalizing system |
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